Window fastener



May 11; 1937. F. SANDA 2,080,187

WINDOW FASTENER "Filed March 12, 1956 By W mu. a g 5 A tlorncyS PatentedMay 11, 1937 UNITED STATES PATENT OFFICE 1 Claim.

This invention appertains to new and useful improvements in windowfasteners.

The principal object of the present invention is to provide a windowfastener for securing windows of the vertical sliding type.

An important object of the present invention is to provide a fastenerfor sliding sashes wherein the sashes can only be opened to a certainextent, unless the sashes be entirely closed to permit disengagement ofthe fastening means, whereupon the sashes can be entirely opened.

Another important object of the invention is to provide a. fastener forwindow sashes Which will be of simple construction and substantiallytamper-proof.

Still another important object of the invention is to provide a fastenerfor Window sashes which will serve effectively to prevent entry throughthe window by unauthorized persons.

Other important objects and advantages of the invention will becomeapparent to the reader of the following specification.

In the drawing:

Figure 1 represents a fragmentary elevational View showing the fasteningmeans.

Figure 2 represents a fragmentary elevational View of the upper sashshowing the slotted plate.

Figure 3 represents an enlarged fragmentary vertical sectional view online 33 of Figure 1.

Figure 4 is an enlarged horizontal sectional view taken substantially online 4-4 of Figure 1.

Figure 5 is a perspective view of the bolt.

Referring to the drawing wherein like numerals designate like parts, itcan be seen that numeral 5 represents a window frame while numerals B-'lrepresent the upper and lower sashes respectively. On one vertical railof the upper sash 6 is secured the elongated rectangular shaped plate 8provided with the longitudinally extending slot 9 therein terminating atits lower end by merging with the circular opening I0 in the plate 8.

Situated behind the plate 8 and formed in the vertical rail a is thelongitudinally extending channel or groove II in which the head l2 ofthe bolt I3 is slidable.

The adjacent vertical rail of the lower sash 1 is denoted by referencecharacter b and has at its upper end a plate 12' secured to its innerside and another like plate l3 secured to its outer side, both platesbeing suitably secured by screws and each provided with a circularopening registering with a bore l4 through the said sash rail 17.

The bolt I3 is slidable through this bore l4 and plates [2 and I3 whenit is desired to retract the head I! through the circular opening ID ofthe plate 8. However, when the sashes are in the position shown inFigure 1 and the head I2 is registering with the circular opening ID, ifit were not for the small radially disposed lug l on the head I2, it islikely and very probable that the head l2 would jar out of the groovell. However, this lug prevents this and the bolt I3 must be rotated sothat the head is in such a position that the lug I5 is registering withthe slot 9 before the bolt can be entirely retracted from the groove ll.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having thus described the invention, what is claimed as new is:

A latch of the character described comprising a slotted plate, saidplate being provided with an enlarged opening at one end with which theslot therein merges, a slidably and rotatably mounted bolt provided witha head, operative in the slot, said head being of a diameter greaterthan the slot to normally prevent Withdrawal therefrom and said headbeing provided with a radially disposed lug capable of being passedthrough the slot of the plate when the head of the bolt is registeringwith the enlarged opening, said lug gravitating toward one side of theslot in the plate to normally maintain the lug out of registry with theslot when the head is registering with the enlarged opening.

FRANK I. SANDA.

